Water-tube boiler.



D. S. JAGOBI WATER TUBE B011. R.

@Pumuckl EILBD SEPT. 1 1912.

1,051,891. Patented Feb.4,1913.

DAID S. JCOBUS, OF JERSEY CITY, NEW JERSEY, ASSIGNOR rATENTfoFFioE.

` WLCOX COMIEANY, F BAYONNE, NEW' JERSEY, A CORPORATION 0F NEW JERSEY.

v Waren-m12 Bomen.

. Tube Boilers, of which tliefollowing is a specification.' I

My invention relates to water tube boilers and has for its object an increase of ellicieucy and capacit-y inl installations of large units.l This obiect is accomplished by arranging two banks of inclined water tubes symmetrically above a common fuel l and combustion chamber, the fuel chamber extending from one side of the boiler to the other to p rovide fr large furnace volume.,

and the heating surfaces of the two banks,

disposed relative to each other so as to form an A-shaped combustion chamber which shall be open toV the escape of the products of combustion, over. the tubes of the heating surface, along the -upper portions of the inclined sides ot the combustion chamber, and the emplovmeut of a central steam and water drum into which all of the steam genorated by the boiler passes and where it is se'parated in part from. the watenvand of soparator and circulating tubes .from this drum to two outer steam and water drums from which 'dry steam .is discharged. This arrangementis especially applicable to high ratos of dri ving as a most olliqignt circula-A tion is obtained and the water is thoroughly eliminated from the steam evcn under conditions where through impure fred water or the like thcremiglxt be trouble with other boilers. i

The invention will be understood by reference to 'the accompanying: drawing', which is a longitudinal section.

-ln the drawing 1 have shown two banks of inclined water tubes, the tubes 1 of the left hand bank bring expanded into lower and upper headers 2 of the right hand bank being!` ex andcd into 'lower and upper headers 'anc (l. These headers extend vtransversely of the boiler from one side wall of the setting to t-he other side wall. Each bank is divided by transverse baliles 7 and S, the bulllcs 7 rising from batlles 9 'extending from Athe lower headers,

-thus providing a plurality of transverse passes for the products of combustion across and around the tubes as indicated by the Specification otLetters latent YAppui-.atom ma september 21, me. seal No. 721,532:

and 3, -and the tubes t arrows. 'In this design use a single cenwith the lower part of the upper headers of the two banks of l,c lgeneratng tubes so that the steam'generated in the tubes which come in contact with the direct radiant heat fromthe (ire, may discharge directly into the drumlO and does not have to travel all the way through the upper headers.l If so de. sired the upper headers of each bank may ple' connections 11* and 12, and the steam tact with the radiant heat will then all pass through the pipes or tubes 11 and 12 and an active circulation will be maintained thereby. I also connect, by pipes or tubes 6 with the centra drum, so that all of the steam generated by theboiler rst passes to the central drum where it is separated in part from the water and from thencepasses tlirough the steam circulators and separatf to conduct the' water which circulates through the boiler from the central1 drum l0 to the outside drums 19 and 20. Down-4 colucrs 21 aud-2'?. connect tho drums 19 and .20 with the lower headers ofthe corresponding 'unit The downcomers support fire brick wallsl extending from the baffles 8 to the drums 19 and 20 to properly direct the mises to the outlet finos 24 and 25.

type, are placed above the first and second noi-ted with the steam space of the drums 19 and 20 respectively. A connection is` provided to deliver saturated steam from said drums if desired. A

The two banks of tubes above described aresuspcnded over-a common furnace extending from the front to the rear of the boilentbe banks being so disposed relative to each other that the upper headers 3 and 6A wnvcrge toward eachother downwardly and their lower ends meet approximately at upper hesrzors I provide a water box 29 at port tiling 30 placed ateach side of the box.

T0 THE BABCOCK &

ing pipes or tubes 15 and 16 to the steam and water drums 19 and 2.0. The water cir-l eulators 17 and 1S connect drum 10 with two y steam and ,Water drums 19 and -20 and serve passes of cach bank of tubes, and are con! the top ofthe furnace which serves to sup- Patented Feb; 4, i913-,

. .tral drum 10 connected by pipes 11 and 12 4 es be made in twol parts by omitting 'the nipgenerated by the tubes which come in con- 13 and 1d, the upper ends of headers 3 and I Superheaters 2G and 27, of any approved the transrersccentral vertical plane of the setting. To protect the lower' ends of the The water box discharges any steam genererated in itthrugh vertical pipes 31 Ileading from itsvtopto the centraldrnl'n 10. There is thus provided a large A-sliaped combustion ehamber'S substantially closed at the apex and open to the products of combustion along theupperportions of the inclined sides, that is, at the uptake ends of the generating'tubes. The gases divide and pass over the heating surfaces, as indicated by the arrows, to the outlet fines. ln this design the 'water Acirculation is upwardl)r throng the'I inclined tubesftocthe upper headers, pipes leadingl therefrom to the central drum 10, from ,the latter to the side drums 19 and 20 through the `downeomers to the 'lower headers.

The furnace is provided with grate bars 32 und a central dumping plate 83 so that when this plate is coveredwith fuel there will be a continuous fuel bed beneath the en# tlire boiler, the furnace being charged through doors 34 in both the front and roar walls. lVith this arrangement, thc character of the combustion may be maintained constant from one side of the boiler to theother, and the loss often experienced through a stream or lane of excessair or uneonsumed combustible gases ,passing through the boiler and escaping,r to the stacks will be avoided, It is well-known among engineers that m ordi` nary boiler furnaces there is a great. variation in'analyscs taken from dillerent points in the path of the flue gases leaving the furnace, whereas with the prcsenturnace arrangement this action is reduced to a mini' mimi, as any irregularity from the front to the rear ofl the grates disappears before the gases pass from the upper part of the comh bustion ,chambery and as the composition o'f the gases fornniform' firing conditions will be uniforin trom one side of the boiler to 1 the other,

it follows that the. composition of the entire volume of the gases leaving the furnace will be substantially uniform.

The angle of inclination of the tubes of the heating' surfaces is approximately 45 or more to the horizontal, and the planes of the headers approximately at an angle of 90 to each other. I do not, however, rcstrict myself to these angles, the essential feature beingr the disposition ofthe units relative to each other over a .common furnace and combustion chamber to,A providean l\.slxap edA combustion chamber of relatively large volume, described, which contribute to au increased etliciency and economy in operation.

1. In a water tube boiler, v'the combina tion and the other features herein- -tnbes and water circulators centrally disposed fuel chamber common to`- said banks oftubes.

2. .ln a water tube boiler, the combination of two banks ofinclined water tubes, 'upper and lower headers into which said tubes are expanded, said banks being so disposed that an -A-shaped combustion chamberis formed between the banks, a central drum abovethc banks of tubes into which all of the steam from the two banks of pipes or tubes connecting both the upper. ends and the lower parts-of the upper headers with said drum, two outer steam and water drums, and steam circulating and tubes is discharged,

separating tubes and water crculators conmeeting the central drinn with said outer drums.

, 3. In a water tube boiler, the combinationof two banks of inclined water tubes, upper and lowerheaders int-o which said tubes are expanded, said banks bein an A-shaped combustion e lumber is formed between the banks, a water box at the to of the combustion chamber, tiles supported on said box to protect the lower ends of the upper luuulers, and a centrally disposed fuel chamber common to said banks of tubes.

4. ln a. water tube boiler, the combination ot two banks ot' inclined water tubes, upper and lowerlicaders into which said tubes are cxijmnded, said banks bring so disposed that au A-shaped combustion chamber is formed .beta-'oon the banks, a water box at the top ot the combustion chamber, tiles supported on said box to protect the lower ends of the upper headers, a central drum above the Abanks of tubes into which all of the steam from the two bunks of tubes is discharged, pipes or tubes connecting said water box and the upper headers with said drum, and a centrally disposed fuel chamber common to said banks of tubes. i

5. In a water tube boiler, the combination of two banks of inclined water tubes, upper and lower headers into which said tubes are' expanded, said banks being so disposed'that an A-shaped combustion chamber is formed between the banks, a Icentrally disposed fuel chamber common to said banks, a central steam and water drum above the banks of tubes into which all of the steam from the two banks of tubes is discharged, two outer drums, steam separating and circulating connecting said central and outer drums, and downeorners connecting said outer drums with the lower headers.

so disposed that los rac

V i 1,051,891 l -v a G. In a water tube boiler, the combination and lower headers into which said tubes are of two banks of inclined water tubes, upper expanded, said banks being so disposed that and lower'headers into which said tubesare 'an A-sha'ped coml'mstion chamber is formed 25 expanded, said banks being so disposed that. between the banks, a central drum above the 5 an A- hoped combustion chamber is formed banks of tubes-intowhich all of tbe steam between the banks, a central drum above thel from 'the two banks of tubes is discharged,v banks 'of tubes into which all of 4the steam the upper headers being, divided into two generated in .the two banks is discharged, sections and pipes or tubes connecting -the 3o ipes or tubes connecting the upper lie'aders separate sections with 'said drinn so as to v 10 with said drum, tfwo outer steam and water Y provide a separate circulation for the tubes drums one for each bank of tubes. steam which come nearest. tl1e-fire, two outer Steam eirculators and separating;` tubes and water and water drums and steam and circulating cireillators connecting the eeut al drum with 'tubes and water circulators connecting thel 3 said outer drums, dmvnemmrs connecting central drunrwith said outervdrums: 15 the outer drums with the.4 lower headers, Tn testimony whereof 'I ,havehereunto battles for directing theA4 gases :ua-oss and signedmy name. in the presence of two subaround the. tubes, tire brick walls supported srribing witnesses'.-

on said downcouwrs lo direct. the gases to VTD the outletflues, and a cent 'ally disposed fuel .D A S JACOg-BUS 90 chamber common. to said banks of tubes. Witnesses:

T. In n water tube boiler, the combination E. CAMP,

of two banks of inclined water tubes, upper i E. P. TERRY.. 

